Stephen Carlson has written a lot of good material on Christmas issues in recent years. I've often cited a 2010 article he published that addresses how we should interpret Luke 2:7 and some issues related to the passage (whether Joseph and Mary were married yet in Luke 2:5, whether Joseph was from Nazareth, etc.).
He's also proposed a new rendering of Luke 2:2 that hasn't gotten much attention yet, but has been endorsed or taken seriously by some scholars who have commented on it. See here. And see here for a discussion of Carlson's response to Richard Carrier on the subject several years ago. I don't know enough about Greek to render much of a judgment of Carlson's proposed translation, but it seems more promising than other translations that are often suggested.
More than a decade ago, Carlson published an article on a passage in Clement of Alexandria that has some relevance to the infancy narratives. See my discussion of the subject here.
Carlson has also published an article on Matthew 1:17 and how Matthew arrived at his count of three groups of fourteen generations.